Yup, looks like one. Needs to be finished like a black ark, flattened and smoothed on a progression up to 2k, then burnished, for razor use.

Translucent and surgical blacks are equally capable of producing very nice shaving edge.

Do not go by grit rating. Go by the shaving edge.

Test it first, if it's smooth and looks like it has been used, it may produce and edge. If not then prep it.